pools: Add a pool for buffers

pkg/environment/globals.go

@@ -1,12 +1,12 @@
 package environment
 
 import (
-	"bytes"
 	"context"
 	"io"
 	"io/fs"
 	"os"
 
+	"github.com/FAU-CDI/wisski-distillery/pkg/pools"
 	"github.com/tkw1536/goprogram/stream"
 )
 
@@ -60,8 +60,10 @@ func ReadFile(env Environment, path string) ([]byte, error) {
 	defer file.Close()
 
 	// copy everything into a buffer!
-	var buffer bytes.Buffer
-	if _, err := io.Copy(&buffer, file); err != nil {
+	buffer := pools.GetBuffer()
+	defer pools.ReleaseBuffer(buffer)
+
+	if _, err := io.Copy(buffer, file); err != nil {
 		return nil, err
 	}
 

pkg/pools/pools.go

@@ -1,6 +1,8 @@
+// Package pools holds various pools for reuse
 package pools
 
 import (
+	"bytes"
 	"strings"
 	"sync"
 )
@@ -17,3 +19,16 @@ func ReleaseBuilder(builder *strings.Builder) {
 	builder.Reset()
 	builders.Put(builder)
 }
+
+var buffers = sync.Pool{
+	New: func() any { return new(bytes.Buffer) },
+}
+
+func GetBuffer() *bytes.Buffer {
+	return buffers.Get().(*bytes.Buffer)
+}
+
+func ReleaseBuffer(buffer *bytes.Buffer) {
+	buffer.Reset()
+	buffers.Put(buffer)
+}